If you plan to use 3 phase, and all new electrical outlet and minimal looping 35k to me is cheap. Does it include new earthing? TNB application for 3 Phase?

Some other cost you may want to consider

01) Copper / Stainless Steel piping (for centralized water heater).
- Think for your Bungalow may need 7 - 10k to cover upper and lower floor
02) Roof tiles also increase a lot, so need to add more buffer
03) CCTV, and Alarm wiring
04) Toilet sink/bowl... This things really very expensive

This look too few for a bungalow. And how many looping are we talking? I'll suggest to have two DB box.. One for Ground, another for first floor. Depend on your room size, you may need 2 for a typical 100sqft room, to maybe 4 for larger and longer wall. How about parking porch? you need to have power socket also.

sl2007 is right, your M&E should have been finalized, looking at the architect you should be able to design number of wall socket, and estimate lighting.

For such a big house, is better to run centralized water heater.

BTW, water heater mixer is not cheap. Around 500 - 1k for a good mixer.

More is better, and make sure get 11 core armored cable up to the gate.

Also make a on/off switch inside the house so you can switch off the outdoor socket when not use. You don't want postman come in charge the phone

And get outdoor / weather proof power socket.

If you building entire house brand new, is good to have all wires hidden in the slab. But this required proper planing early design of electrical points / outlet.

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Added on August 29, 2011, 1:56 pmcompare apply and apple, you can compare per point / outlet. If 35k give you only 100 outlets, but 60k give you 200 outlets it workout 60k contractor is cheaper.

This post has been edited by weikee: Aug 29 2011, 01:56 PM

Water storage heating piping can be difference from solar piping, can be 70% difference.